Instead of trying to compare Arnold to the singular image you have of him from his bodybuilding or acting days, try thinking about all of the ways he's evolved over the years and the fact that he's still very much in demand.
Basing things just on his physical appearance is a very superficial and incorrect way of looking at things. Although he's made a lot of money by things relating to how he looks, there is and will always be that inner drive which compels the body to say and do what it does. Without that, there is no Arnold.
No human in this world is perfect - we all have flaws. Any way you look at it, though, Arnold is and will always be an American success story.